Sorry guys but lots of bad advice. Nutgrass, aka, nutsedge, has rhizamatous roots and nutlets that remain in the ground after pulling. The little nuts are edible so you could eat your way out of the problem. Pulling the mother plant encourages these nutlets to sprout and grow additional plants.
Your main options in cool season turf are sulfentrazone (dismiss) and halosufuron (sedge hammer). I prefer sulfentrazone as it comes pre-mixed from common companies like Ortho, unlike halosufuron which comes as a granular powder or tablet that you mix in your hand sprayer. Sulfentrazone is a quicker kill of the mother plant, but some people think it's less effective at killing the little nutlet roots underground.
Head to the hardware store and find something that says nutgrass or nutsedge right on the label. Some of the cocktail weed killers contain a boost of sulfentrazone at a lower rate and will list nutsedge control, but I prefer a stand alone product of sulfentrazone as it's mixed stronger. You'll likely need to spray it and then spray again in like 14 days. Some will still come back next year so it's usually a multi year process to eliminate nutsedge.
